setup.c
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上传日期:2013-02-24
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- /*
- * Platform dependent support for DIG64 platforms.
- *
- * Copyright (C) 1999 Intel Corp.
- * Copyright (C) 1999, 2001 Hewlett-Packard Co
- * Copyright (C) 1999, 2001 David Mosberger-Tang <davidm@hpl.hp.com>
- * Copyright (C) 1999 VA Linux Systems
- * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
- * Copyright (C) 1999 Vijay Chander <vijay@engr.sgi.com>
- */
- #include <linux/config.h>
- #include <linux/init.h>
- #include <linux/delay.h>
- #include <linux/kernel.h>
- #include <linux/kdev_t.h>
- #include <linux/string.h>
- #include <linux/tty.h>
- #include <linux/console.h>
- #include <linux/timex.h>
- #include <linux/sched.h>
- #include <asm/io.h>
- #include <asm/machvec.h>
- #include <asm/system.h>
- /*
- * This is here so we can use the CMOS detection in ide-probe.c to
- * determine what drives are present. In theory, we don't need this
- * as the auto-detection could be done via ide-probe.c:do_probe() but
- * in practice that would be much slower, which is painful when
- * running in the simulator. Note that passing zeroes in DRIVE_INFO
- * is sufficient (the IDE driver will autodetect the drive geometry).
- */
- char drive_info[4*16];
- unsigned char aux_device_present = 0xaa; /* XXX remove this when legacy I/O is gone */
- void __init
- dig_setup (char **cmdline_p)
- {
- unsigned int orig_x, orig_y, num_cols, num_rows, font_height;
- /*
- * Default to /dev/sda2. This assumes that the EFI partition
- * is physical disk 1 partition 1 and the Linux root disk is
- * physical disk 1 partition 2.
- */
- ROOT_DEV = to_kdev_t(0x0802); /* default to second partition on first drive */
- #ifdef CONFIG_SMP
- init_smp_config();
- #endif
- memset(&screen_info, 0, sizeof(screen_info));
- if (!ia64_boot_param->console_info.num_rows
- || !ia64_boot_param->console_info.num_cols)
- {
- printk("dig_setup: warning: invalid screen-info, guessing 80x25n");
- orig_x = 0;
- orig_y = 0;
- num_cols = 80;
- num_rows = 25;
- font_height = 16;
- } else {
- orig_x = ia64_boot_param->console_info.orig_x;
- orig_y = ia64_boot_param->console_info.orig_y;
- num_cols = ia64_boot_param->console_info.num_cols;
- num_rows = ia64_boot_param->console_info.num_rows;
- font_height = 400 / num_rows;
- }
- screen_info.orig_x = orig_x;
- screen_info.orig_y = orig_y;
- screen_info.orig_video_cols = num_cols;
- screen_info.orig_video_lines = num_rows;
- screen_info.orig_video_points = font_height;
- screen_info.orig_video_mode = 3; /* XXX fake */
- screen_info.orig_video_isVGA = 1; /* XXX fake */
- screen_info.orig_video_ega_bx = 3; /* XXX fake */
- }
- void
- dig_irq_init (void)
- {
- /*
- * Disable the compatibility mode interrupts (8259 style), needs IN/OUT support
- * enabled.
- */
- outb(0xff, 0xA1);
- outb(0xff, 0x21);
- }